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REQUIREMENTS/SPECIFICATIONS
Page 2-3
Maximum Lobe Lengths
The lobe length is the physical length of the cable connecting a station
to its TCU port at the TRXI. Table 2-2 shows the maximum lobe
length, according to ring speed. The cable lengths listed in Table 2-2
are total lengths made up of UTP cable only.
Type 3 Media Filters
To connect a UTP lobe segment from a TRXI-22 or TRXI-24 to a
station supporting STP cabling, you need a Type 3 Media Filter.
Cabletron Systems offers the following Type 3 Media Filters:
•
TRMF
, RJ45 (UTP) connector to 10-inch DB9 (STP) cable with
LANVIEW
•
TRMF-2
, RJ45 (UTP) connector to DB9 (STP) connector
Maximum Number of Stations
When you use UTP lobe cabling anywhere on the ring, the number of
stations is limited to
100 stations
at ring speeds of either
4 or 16 Mbps.
Table 2-2. UTP Maximum Lobe Lengths
UTP Cable Type Maximum Lobe Length
4 Mbps 16 Mbps
Category 3 100 meters 60 meters
(330 feet) (198 feet)
Category 4 100 meters 60 meters
(330 feet) (198 feet)
Category 5 130 meters 85 meters
(429 feet) (280.5 feet)